assuming you meant 64 square foot area (cuz i dunno how a square has a radius fam)
$${\sqrt{{\mathtt{64}}}} = {\mathtt{8}}$$
since is its a square, its side lengths can be found be square rooting the area
$${\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{4}} = {\mathtt{32}}$$
then by multiplying by 4
so the total perimeter of the square is 32 feet
assuming you meant 64 square foot area (cuz i dunno how a square has a radius fam)
$${\sqrt{{\mathtt{64}}}} = {\mathtt{8}}$$
since is its a square, its side lengths can be found be square rooting the area
$${\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{4}} = {\mathtt{32}}$$
then by multiplying by 4
so the total perimeter of the square is 32 feet
